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The QOU3100 is a high-quality Square D 3P100A circuit breaker designed for reliable performance in 240V applications. This bolt-on and DIN rail breaker ensures easy installation and robust protection for your electrical systems. Ideal for commercial and industrial use, it offers peace of mind with its dependable circuit interruption capabilities.
No — the QOU and QO are different frame series and are not interchangeable. The QOU series is a compact commercial/industrial breaker with both bolt-on and DIN rail mounting, while the QO is a residential plug-on series. Always verify your panelboard accepts the QOU frame before ordering.
Yes. The QOU3100 is rated for 240V AC, which covers both 208V and 240V 3-phase systems commonly found in Canadian commercial installations. Its 10kA interrupting rating must meet or exceed the available fault current at the point of installation — confirm this with your panel's short-circuit study.
The QOU series can be difficult to source through standard distribution channels. Northern Breaker Group specializes in obsolete and hard-to-find breakers across Canada, with counter locations in Calgary, Edmonton, and Vancouver. Contact us for a quote and current availability.
